Question

In ∆ABC, D and E are points on sides AB and AC such that DE II BC. If
AD = 3cm, DB = 3x cm, AE = 2 cm and EC = 10cm, find the length DB.

x→0(√(1+x)-√(1-x)/x

x→0(√(1+x)-√(1-x)/x

x→0(√(1+x)-√(1-x)/x

There are 80% chances that a problem will be solved by a statistics student and 60% chances that the same problem will be solved by a mathematics student. What is the probability that atleast one will solve that problem?

Lightning is seen first, before the thunder is heard,
during a thunderstorm.